Handling JSON data in Codeigniter Controller

Question

I have a problem to send the JSON data from JQuery with GET request. This is my JQuery to send the data with GET.

    var xhr = new XMLHttpRequest();
    var url = "http://example.com/share/new?data=" + JSON.stringify({"id": "1", "type": "new", "data": "testabcd"});
    xhr.open("GET", url, true);
    xhr.setRequestHeader("Content-type", "application/json");
    xhr.onreadystatechange = function () {
        if (xhr.readyState === 4 && xhr.status === 200) {
            var json = JSON.parse(xhr.responseText);
        }
    };
    xhr.send();

This is in my Controller file.

    public function share()
    {
        header('Content-type: application/json');

        $Data = json_decode($_GET["data"]);

        $data_share = array(
            'id' => $Data['id'],
            'type' => $Data['type'],
            'data' => $Data['data']);

        $this->db->insert('mytable', $data_share);

        return "200";
    }

The problem is nothing grab in the Controller and the insert query doesn't insert anything. How to fix this problem ? Maybe I do something wrong in my code ? Thank you before.

Does $Data have value?

aldrin27
– aldrin27

2017-06-19 06:29:32 +00:00
Commented Jun 19, 2017 at 6:29 — aldrin27
– aldrin27, Commented Jun 19, 2017 at 6:29
@aldrin27 How to see $Data has a value or not ?

Antonio
– Antonio

2017-06-19 06:33:33 +00:00
Commented Jun 19, 2017 at 6:33 — Antonio
– Antonio, Commented Jun 19, 2017 at 6:33
print_r($Data); exit; below $Data

aldrin27
– aldrin27

2017-06-19 06:34:52 +00:00
Commented Jun 19, 2017 at 6:34 — aldrin27
– aldrin27, Commented Jun 19, 2017 at 6:34
Nothing happen after I add print_r @aldrin27

Antonio
– Antonio

2017-06-19 06:43:32 +00:00
Commented Jun 19, 2017 at 6:43 — Antonio
– Antonio, Commented Jun 19, 2017 at 6:43

Riaz Laskar · Accepted Answer · 2017-06-19 07:24:59Z

4

when you send json data to php its in doesn't come in $_POST or $_GET its in php://input strem;

the ajax request u send ws not jQuery its core js, which is good but its quite unflexible and tends to break in different browser. i just used the jQuery version of the ajax which is very flexible and cross-browser as well.

try this : JS:

$.ajax({
      method:'POST',
      contentType:'application/json',
      url:'http://example.com/share/new',
      data: JSON.stringify({"id": "1", "type": "new", "data": "testabcd"}),
      success:function(response){
       console.log(response);
      }

   });

PHP:

public function reservation()
{

    $Data = json_decode(file_get_contents('php://input'), true);

    $data_share = array(
        'id' => $Data['id'],
        'type' => $Data['type'],
        'data' => $Data['data']);

    $this->db->insert('mytable', $data_share);

    return "200";
}

edited Jun 19, 2017 at 7:24

answered Jun 19, 2017 at 6:23

Riaz Laskar

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19 Comments

Antonio Over a year ago

It's better than my code but I still got NULL data when insert to my database. It's mean I still cannot get the data.

Riaz Laskar Over a year ago

since you were using core js i hv converted to jquery ajax, i think it should work now

Antonio Over a year ago

Sorry, I don't really understand with converted to jquery ajax. Could you explain more ? Thanks

Riaz Laskar Over a year ago

i mean the ajax request u send ws not jQuery its core js, which is good but its quite unflexible and tends to break in different browser. i just used the jQuery version of the ajax which is very flexible and cross-browser as well.

Antonio Over a year ago

Could you give me some example ?

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